Intel
ยฎ
EP80579 Integrated Processor Product LineโBaseboard Requirements
Intel
ยฎ
EP80579 Integrated Processor Product Line
Platform Design Guide May 2010
36 Order Number: 320068-005US
3.3 Mounting
The Development Board uses non-plated holes for mounting the board. The mounting
holes have a spoked ground ring on the top and bottom of the board for all true
mounting holes. The hole size for a true mounting hole is 0.125" and the ground ring
outer diameter is 0.40". The hole placement follows Extended ATX wherever possible.
The Development Board also uses phantom mounting holes. Phantom mounting holes
are 0.4" etch keep-out circles on the bottom of the board. The phantom holes can be
used for extra board support by aligning a stand off in the center of the phantom hole.
Table 7. Development Board Summary
Board Factor Recommendation
Material
โข Standard FR4 Tg 170 Epoxy
โข 370HR used for lead free
Impedance
requirements
1
โข DDR2:
โข Varies depending on the layer, the signal, and the topology used.
โขPCI Express*:
โข 90 ฮฉ ยฑ10% differential with 4.5-mils trace width for stripline layers
โข 90 ฮฉ ยฑ10% differential with 4.75-mils trace width for microstrip layers
Etch-Etch Spacing โข See the routing guidelines for each interface for this information.
Finished Via Size โข Minimum via size is 10 mils finished hole/21 mils pad/31 mils anti pad
Finish โข Soldermask over bare copper (SMOBC) and immersion gold
Soldermask Type โข SM-840 minimum web 4 mils
Fabrication โข Edge Routed
Component
Technology
โข Through hole/SMT
โข QFP, BGA, and discrete 0603, 0805 Front side (Top layer)
โข Discrete 0603, 0805,7343, 1210 Back side (Bottom layer)
Note:
1. See the appropriate section in this guide for all possible impedance information. This table is only a
general summary.
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